Cancer: Smoking & the Bladder

The statistical fact that heavy cigarette
smokers are more likely to die of lung cancer than are nonsmokers has
been known for years, but no one has yet been able to pinpoint the
process by which smoking exerts its lethal effect. That the death rate
from cancer of the bladder is more than three times as high for smokers
as for nonsmokers has been recognized more recently, and it has seemed
even more difficult to explain. Yet, ironically, it is the hard to
explain bladder cancers that have backed up statistics by yielding the
first biochemical evidence that smoking...